Haven't seen something like this done for Ultrakill so I decided to make one with images I thought fit the varying tracks used in the video. Most of the music is from ACT I

Tracks/Sounds used in order (changes every 15 or so seconds):
1. The Fire Is Gone (for Piano, Saxophone and Trumpet)
2. Into the Fire
3. Take Care
4. A Complete and Utter Destruction of the Senses
5. Versus
6. Cold Winds
7. Requiem (This one I think fits the most)
8. Panic Betrayer
9. Guts
10. Divine Intervention
11. [YOU ARE DEAD] (I'm aware this is more a sound than a track but still thought I'd throw it in)
12. The Cyber Grind
13. The Fire Is Gone (for Music Box)

Explanations to my methodology (feel free to ignore just figured I'd put this here because I wanted to explain the thought process)

1. Setting up the game/PSX aesthetic Ultrakill has.
2. Fire, to go into.
3. Cat is taking care by being well prepared :).
4. LOUD BIRD DESTROYS YOUR AUDITORY SENSES
5. FLY VERSUS FLY
6. Cold wind passes the cow or something
7. Requiem I feel is self explanatory
8. First encounter with the Mind Flayer
9. Self explanatory=Guts/Intestines
10. "Biblically Accurate Angel"
11. Although not a track in the ost=Ded
12. Ever put a person's face in The Cyber Grind? It kind of gets warped like in the image
13. Music Box TFIG makes me kind of sad.